Commit 6e65cf81 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by Andrii Nakryiko
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selftests/bpf: Strengthen timer_start_deadlock test 



Strengthen timer_start_deadlock test and check for recursion now

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20260204055147.54960-5-alexei.starovoitov@gmail.com
parent 64873307

tools/testing/selftests/bpf/progs/timer_start_deadlock.c

+2 −7
Original line number Diff line number Diff line
@@ -31,7 +31,6 @@ SEC("tp_btf/hrtimer_cancel") 
int BPF_PROG(tp_hrtimer_cancel, struct hrtimer *hrtimer)

{

	struct bpf_timer *timer;

	static bool called = false;

	int key = 0;



	if (!in_timer_start)
@@ -42,13 +41,9 @@ int BPF_PROG(tp_hrtimer_cancel, struct hrtimer *hrtimer) 


	/*

	 * Call bpf_timer_start() from the tracepoint within hrtimer logic

	 * on the same timer to make sure it doesn't deadlock,

	 * and do it once.

	 * on the same timer to make sure it doesn't deadlock.

	 */

	if (!called) {

		called = true;

	bpf_timer_start(timer, 1000000000, 0);

	}

	return 0;

}